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On-line Access: 2008-01-27

Received: 2007-10-15

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.3 P.303-312


Effect of pile-cap connection on behavior of torsionally loaded pile groups

Author(s):  Ling-gang KONG, Li-min ZHANG

Affiliation(s):  Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   klg@zju.edu.cn, cezhangl@ust.hk

Key Words:  Pile group, Pile foundations, Torsional response, Pile-cap connection, Nonlinear analysis

Ling-gang KONG, Li-min ZHANG. Effect of pile-cap connection on behavior of torsionally loaded pile groups[J]. Journal of Zhejiang University Science A, 2008, 9(3): 303-312.

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%T Effect of pile-cap connection on behavior of torsionally loaded pile groups
%A Ling-gang KONG
%A Li-min ZHANG
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%DOI 10.1631/jzus.A0720022

T1 - Effect of pile-cap connection on behavior of torsionally loaded pile groups
A1 - Ling-gang KONG
A1 - Li-min ZHANG
J0 - Journal of Zhejiang University Science A
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SP - 303
EP - 312
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0720022

To evaluate the responses of fixed and pinned pile groups under torsion, a method is presented to analyze the nonlinear behavior of free-standing pile groups with rigid pile caps. The method is capable of simulating the nonlinear soil response in the near field using p-y and τ-θ curves, the far-field interactions through Mindlin’s and Randolph’s elastic solutions, and the coupling effect of lateral resistance on torsional resistance of the individual piles using an empirical factor. Based on comparisons of the solutions for fixed- and pinned-head, 1×2, 2×2, and 3×3 pile groups subjected to torsion, it was found that pile-cap connection significantly influences the torsional capacity of pile groups and the assignment of applied torques in the pile groups. In this study, the applied torques for the pinned-head pile groups are only 44%~64% of those for the corresponding fixed-head pile groups at a twist angle of 2°. Such a difference is mainly due to the change of the lateral resistances of individual piles in the groups.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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